LineTroll 110 Tµ(r) Fault passage indicator for overhead lines (66-138kV)

Product number LineTroll 110 Tµr: 04-1200-13
Product number LineTroll 110 Tµr, exluded corona trap: 04-1200-15
Product number replacement battery KB 111: 1056

LineTroll 110 Tµ(r) Fault indicates earth- and shortcircuit - faults by detection of changes in the magnetic field set up by the fault current. The indicator can detect and independently indicate both permanent and transient faults. A cluster of red LED's for permanent fault and one green LED for transient fault.  An orange LED will give indication of low battery status. Hig visibillity.

Features Linetroll 110Tµ(r):
Programmable operating parameters.
High visibility (>12 lumens)
Usable on all Sub-Transmission voltage distribution networks 66-138 kV.
Usable on multicircuit systems.
Voltage or current as start criteria (programmable)
Dual indications (permanent and transient faults)
Resistant to tough weather conditions
Battery capacity monitoring
Special version LT-110 Tµr is available with integrated radio for SCADA monitoring.

Functional Description

LineTroll 110Tµ continuously monitors the line voltage and phase current, the sources of information it needs to operate. The unit is fully self-contained, no external transformers or connections is required. During normal line conditions, LineTroll 110Tµ remains extinguished.

The indicator monitors for a specific sequence of line conditions to happen before it starts flashing. The general sequence is as follows:

A. The line should be energised (voltage or current present) for a minimum of 5 seconds.
B. Di/Dt: The line current should increase rapidly by the ammount of a user set value (step level). Treshold: The line current exceeding a preset current level.
C. The line should be de-energised (voltage or current not present).

The user may program the conditions for operation to suit his local requirement by manipulating a bank of DIP-switches inside the indicator.

Note: Voltage or current as a start and stop criteria is user programmable.

Technical Specifications:

Application:
Short circuit and Earth fault indication for overhead lines.
System voltage: HV-Distr. - and transmission lines (66-138[kV])
Grounding system: Resistor and solidly grounded.

Fault-detection:
Sensitivity Di/Dt: 500, 1000 [A]
Sensitivity threshold: 500, 1000 [A]
Duration: >60 ms (20 ms on request)

Inrush blocking: 5 seconds.

Reset:
Automatic:
Re-energized line (voltage or current)*.
A) minimum reset current: 50 [A]or
B) minimum reset voltage: 50 [kV]
Timer: 2, 6, 12 or 24 hours*
Manual: By magnet (remotely for LT-110Tµr)

*:User programmable DIP-switches.

Indication:
1 Green LED for transient fault.
4 Red LED's for permanent fault.
1 Red/orange LED for low battery indication.
Intensity: >12 lumens.

Power supply:
Battery change: every 1200 flash hours, norm. every 7-8 years.

Mounting:
Hot-stick: Live-line mounting with shotgun hot stick.
Conductor size: 5-36 [mm].

Temperature:
-40 to +85 degrees celcius.

Housing:
Material: Polycarbonate, UV-stabilized.
Line-Clutch: Polyamide.
Dimension: 235 x 158 [mm].
Weight: 482 [g]
Protection class: IP 54.

Packaging information:
Number of units each kit: 3 units.
Dim. box with units: 165 x 260 x250 [mm].
Weight (3 units): 1635 [g].

Special version:
LT-110 Tµr: Integrated 2,4 [GHz] radio.
Datarate/messages: 250 [kbps] Fault and status (battery and comm.).
Tx Power /Rx sens: 1 [mW] / -90 [dBm].
Range: > 20 m LoS (margin 20 [dB]).
Concentrator: Nortroll's CmT 110C /115 C.